--  @testpoint:opengauss关键字cobol(非保留)，作为函数名
--关键字不带引号-成功
drop function if exists cobol;
create function cobol(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--清理环境
drop function cobol;

--关键字带双引号-成功
drop function if exists "cobol";
create function "cobol"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--清理环境
drop function "cobol";

--关键字带单引号-合理报错
drop function if exists 'cobol';
create function 'cobol'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--关键字带反引号-合理报错
drop function if exists `cobol`;
create function `cobol`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/